Region embraced in the operations of the armies against Richmond and Petersburg
"39th Cong. 1st Sess.--Report of the Chief Engineer U.S.A. No. 12." Description derived from published bibliography. From: Report of the Secretary of War, 1865. United States. 39th Congress, 1st Session, 1865-66. Relief shown by hachures. This item is in the Map Collection of the Library of Virginia; please contact the Library's Archives Research Services department for more information. Union works outlined in pink, rebel...
United States. War Dept. Engineer Bureau - Michler, N. (Nathaniel) - Bowen & Co. - United States. Army. Corps of Engineers